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Anon67
@anon67
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Active Member
Joined: Jan 10, 2026
Last seen: Jan 16, 2026
Topics: 1 / Replies: 5
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RE: Vaillant aroTherm not heating with many faults

Thank you all for your help with trying to get this sorted. Just a quick update to close this thread off incase anyone has similar in the future. I...

2 months ago
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RE: Vaillant aroTherm not heating with many faults

@ashp-bobba Yeah I'll give it a go, will check filters as well. Thanks for your suggestions. I'm hoping it's something repairable, no heating in ...

2 months ago
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RE: Vaillant aroTherm not heating with many faults

@ashp-bobba It has been recently serviced, October 25. I did call vaillant & installer but shut until Monday I didn't try with water but it ...

2 months ago
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RE: Vaillant aroTherm not heating with many faults

@jamespa Going off those faults it's looking more towards a blockage of some sort. I had a look at the diverter valve, it's a honeywell v4044c, I...

2 months ago
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RE: Vaillant aroTherm not heating with many faults

@jamespa On the live monitor I'm getting "Heating compressor blocked" "Evaporation temperature too low" Also had a new fault code this mornin...

2 months ago
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